Facebook has unveiled a redesign that focuses on the Groups feature of its main social network, doubling down on a successful but controversial part of its namesake app and another sign that Facebook is moving toward more private, intimate communication. Photo: Bloomberg

Facebook has unveiled a redesign that focuses on the Groups feature of its main social network, doubling down on a successful but controversial part of its namesake app and another sign that Facebook is moving toward more private, intimate communication. Photo: Bloomberg